package com.wang.android.library.tool.QRCode;

import android.graphics.Bitmap;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import java.util.Hashtable;

/**
 * Created by LIULIN60 on 2017/1/14.
 */

public class QR_code
{

    //dimension2 method with new zxing.jar
    public Bitmap Create2DCode(String text){
        //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 0);
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//高容错率，提高扫描效果//preq 43714
        BitMatrix matrix;
        try {
            int width1 = 400; // 图像宽度
            int height1 = 400; // 图像高度
            matrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE,width1,height1,hints);
            int width = matrix.getWidth();
            int height = matrix.getHeight();
            //二维矩阵转为一维像素数组,也就是一直横着排了
            int[] pixels = new int[width * height];
            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++) {
                    if(matrix.get(x, y)) {
                        pixels[y * width + x] = 0xff000000;
                    }else {
                        pixels[y * width + x] = 0xffffffff;
                    }
                }
            }
            Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
            //通过像素数组生成bitmap,具体参考api
            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
            // overlapImage(bitmap);
            return bitmap;
        } catch (WriterException e) {
            e.printStackTrace();
        }
        return null;
    }
}
